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/**
*
* File Name: omxVCM4P10_BlockMatch_Integer.c
* OpenMAX DL: v1.0.2
* Revision: 9641
* Date: Thursday, February 7, 2008
*
* (c) Copyright 2007-2008 ARM Limited. All Rights Reserved.
*
*
*
* Description:
* Contains modules for Block matching, a full search algorithm
* is implemented
*
*/
#include "omxtypes.h"
#include "armOMX.h"
#include "omxVC.h"
#include "armVC.h"
#include "armCOMM.h"
/**
* Function: omxVCM4P10_BlockMatch_Integer (6.3.5.2.1)
*
* Description:
* Performs integer block match. Returns best MV and associated cost.
*
* Input Arguments:
*
* pSrcOrgY - Pointer to the top-left corner of the current block. If
* iBlockWidth==4, 4-byte alignment required. If iBlockWidth==8,
* 8-byte alignment required. If iBlockWidth==16, 16-byte alignment
* required.
* pSrcRefY - Pointer to the top-left corner of the co-located block in the
* reference picture. If iBlockWidth==4, 4-byte alignment
* required. If iBlockWidth==8, 8-byte alignment required. If
* iBlockWidth==16, 16-byte alignment required.
* nSrcOrgStep - Stride of the original picture plane, expressed in terms
* of integer pixels; must be a multiple of iBlockWidth.
* nSrcRefStep - Stride of the reference picture plane, expressed in terms
* of integer pixels
* pRefRect - pointer to the valid reference rectangle inside the reference
* picture plane
* nCurrPointPos - position of the current block in the current plane
* iBlockWidth - Width of the current block, expressed in terms of integer
* pixels; must be equal to either 4, 8, or 16.
* iBlockHeight - Height of the current block, expressed in terms of
* integer pixels; must be equal to either 4, 8, or 16.
* nLamda - Lamda factor; used to compute motion cost
* pMVPred - Predicted MV; used to compute motion cost, expressed in terms
* of 1/4-pel units
* pMVCandidate - Candidate MV; used to initialize the motion search,
* expressed in terms of integer pixels
* pMESpec - pointer to the ME specification structure
*
* Output Arguments:
*
* pDstBestMV - Best MV resulting from integer search, expressed in terms
* of 1/4-pel units
* pBestCost - Motion cost associated with the best MV; computed as
* SAD+Lamda*BitsUsedByMV
*
* Return Value:
* OMX_Sts_NoErr, if the function runs without error.
* OMX_Sts_BadArgErr - bad arguments: if one of the following cases occurs:
* - any of the following poitners are NULL:
* pSrcOrgY, pSrcRefY, pRefRect, pMVPred, pMVCandidate, or pMESpec.
* - Either iBlockWidth or iBlockHeight are values other than 4, 8, or 16.
* - Any alignment restrictions are violated
*
*/
OMXResult omxVCM4P10_BlockMatch_Integer (
const OMX_U8 *pSrcOrgY,
OMX_S32 nSrcOrgStep,
const OMX_U8 *pSrcRefY,
OMX_S32 nSrcRefStep,
const OMXRect *pRefRect,
const OMXVCM4P2Coordinate *pCurrPointPos,
OMX_U8 iBlockWidth,
OMX_U8 iBlockHeight,
OMX_U32 nLamda,
const OMXVCMotionVector *pMVPred,
const OMXVCMotionVector *pMVCandidate,
OMXVCMotionVector *pBestMV,
OMX_S32 *pBestCost,
void *pMESpec
)
{
/* Definitions and Initializations*/
OMX_INT candSAD;
OMX_INT fromX, toX, fromY, toY;
/* Offset to the reference at the begining of the bounding box */
const OMX_U8 *pTempSrcRefY, *pTempSrcOrgY;
OMX_S16 x, y;
OMXVCMotionVector diffMV;
OMX_S32 nSearchRange;
ARMVCM4P10_MESpec *armMESpec = (ARMVCM4P10_MESpec *) pMESpec;
/* Argument error checks */
armRetArgErrIf((iBlockWidth == 4) && (!armIs4ByteAligned(pSrcOrgY)), OMX_Sts_BadArgErr);
armRetArgErrIf((iBlockWidth == 8) && (!armIs8ByteAligned(pSrcOrgY)), OMX_Sts_BadArgErr);
armRetArgErrIf((iBlockWidth == 16) && (!armIs16ByteAligned(pSrcOrgY)), OMX_Sts_BadArgErr);
armRetArgErrIf((iBlockWidth == 4) && (!armIs4ByteAligned(pSrcRefY)), OMX_Sts_BadArgErr);
armRetArgErrIf((iBlockWidth == 8) && (!armIs8ByteAligned(pSrcRefY)), OMX_Sts_BadArgErr);
armRetArgErrIf((iBlockWidth == 16) && (!armIs16ByteAligned(pSrcRefY)), OMX_Sts_BadArgErr);
armRetArgErrIf(pSrcOrgY == NULL, OMX_Sts_BadArgErr);
armRetArgErrIf(pSrcRefY == NULL, OMX_Sts_BadArgErr);
armRetArgErrIf(pMVPred == NULL, OMX_Sts_BadArgErr);
armRetArgErrIf(pMVCandidate == NULL, OMX_Sts_BadArgErr);
armRetArgErrIf(pBestMV == NULL, OMX_Sts_BadArgErr);
armRetArgErrIf(pBestCost == NULL, OMX_Sts_BadArgErr);
armRetArgErrIf(((iBlockWidth!=4)&&(iBlockWidth!=8)&&(iBlockWidth!=16)) , OMX_Sts_BadArgErr);
armRetArgErrIf(((iBlockHeight!=4)&&(iBlockHeight!=8)&&(iBlockHeight!=16)) , OMX_Sts_BadArgErr);
armIgnore (pMESpec);
if(iBlockWidth == 4)
{
nSearchRange = armMESpec->MEParams.searchRange4x4;
}
else if(iBlockWidth == 8)
{
nSearchRange = armMESpec->MEParams.searchRange8x8;
}
else
{
nSearchRange = armMESpec->MEParams.searchRange16x16;
}
/* Check for valid region */
fromX = nSearchRange;
toX = nSearchRange;
fromY = nSearchRange;
toY = nSearchRange;
if ((pCurrPointPos->x - nSearchRange) < pRefRect->x)
{
fromX = pCurrPointPos->x - pRefRect->x;
}
if ((pCurrPointPos->x + iBlockWidth + nSearchRange) > (pRefRect->x + pRefRect->width))
{
toX = pRefRect->width - (pCurrPointPos->x - pRefRect->x) - iBlockWidth;
}
if ((pCurrPointPos->y - nSearchRange) < pRefRect->y)
{
fromY = pCurrPointPos->y - pRefRect->y;
}
if ((pCurrPointPos->y + iBlockWidth + nSearchRange) > (pRefRect->y + pRefRect->height))
{
toY = pRefRect->width - (pCurrPointPos->y - pRefRect->y) - iBlockWidth;
}
pBestMV->dx = -fromX * 4;
pBestMV->dy = -fromY * 4;
/* Initialize to max value as a start point */
*pBestCost = 0x7fffffff;
/* Looping on y- axis */
for (y = -fromY; y <= toY; y++)
{
/* Looping on x- axis */
for (x = -fromX; x <= toX; x++)
{
/* Positioning the pointer */
pTempSrcRefY = pSrcRefY + (nSrcRefStep * y) + x;
pTempSrcOrgY = pSrcOrgY;
/* Calculate the SAD */
armVCCOMM_SAD(
pTempSrcOrgY,
nSrcOrgStep,
pTempSrcRefY,
nSrcRefStep,
&candSAD,
iBlockHeight,
iBlockWidth);
diffMV.dx = (x * 4) - pMVPred->dx;
diffMV.dy = (y * 4) - pMVPred->dy;
/* Result calculations */
armVCM4P10_CompareMotionCostToMV ((x * 4), (y * 4), diffMV, candSAD, pBestMV, nLamda, pBestCost);
} /* End of x- axis */
} /* End of y-axis */
return OMX_Sts_NoErr;
}
/* End of file */
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